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Review of stabilization of polyolefin insulated conductors. Part I: Theory and factors affecting stability
Author(s) -
Hendrickson L.,
Connole Kent B.
Publication year - 1995
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760350215
Subject(s) - polyolefin , materials science , polymer , composite material , crystallinity , metal , thermal stability , polymer chemistry , chemical engineering , metallurgy , layer (electronics) , engineering
The understanding of the failure mechanism causing cracks in insulated telephone wire is critical to developing a solution to the problem. This paper reviews the antioxidant and metal deactivator theory as it applies to polyolefins and reviews the factors, both internal to the polymer and external which affect stability. Degradation theory in vacuum and air is reviewed. Primary and secondary antioxidants are discussed as are multifunctional metal deactivator/antioxidant molecules. The internal factors affecting thermal stability which are discussed include: polymer synthesis process, molecular weight, molecular weight distribution, crystallinity, phase state, orientation, amount of antioxidant, amount of metal deactivator, and amount of blowing agent. The external factors affecting long term life are: temperature, oxygen, ozone, stress, filling compound, and presence of copper.